Author: Armin Rigo <[email protected]>
Branch:
Changeset: r88690:047b28974149
Date: 2016-11-28 09:58 +0100
http://bitbucket.org/pypy/pypy/changeset/047b28974149/
Log: Issue #2438: Windows: llexternal functions declared explicitly with
calling_conv='c' should still be directly callable by the JIT
(performance only)
diff --git a/rpython/rtyper/lltypesystem/rffi.py
b/rpython/rtyper/lltypesystem/rffi.py
--- a/rpython/rtyper/lltypesystem/rffi.py
+++ b/rpython/rtyper/lltypesystem/rffi.py
@@ -74,7 +74,8 @@
def llexternal(name, args, result, _callable=None,
compilation_info=ExternalCompilationInfo(),
sandboxsafe=False, releasegil='auto',
- _nowrapper=False, calling_conv='c',
+ _nowrapper=False,
+ calling_conv='unknown' if sys.platform == 'win32' else 'c',
elidable_function=False, macro=None,
random_effects_on_gcobjs='auto',
save_err=RFFI_ERR_NONE):
@@ -97,8 +98,9 @@
don't bother releasing the GIL. An explicit True or False
overrides this logic.
- calling_conv: deprecated, because it's hard to get it right 100% of the
- time. Nowadays it is ignored except for tests.
+ calling_conv: if 'unknown' or 'win', the C function is not directly seen
+ by the JIT. If 'c', it can be seen (depending on
+ releasegil=False). For tests only, it defaults to 'c'.
"""
if _callable is not None:
assert callable(_callable)
@@ -110,7 +112,8 @@
_callable = generate_macro_wrapper(
name, macro, ext_type, compilation_info)
else:
- _callable = ll2ctypes.LL2CtypesCallable(ext_type, calling_conv)
+ _callable = ll2ctypes.LL2CtypesCallable(ext_type,
+ 'c' if calling_conv == 'unknown' else calling_conv)
else:
assert macro is None, "'macro' is useless if you specify '_callable'"
if elidable_function:
@@ -211,9 +214,9 @@
# ...well, unless it's a macro, in which case we still have
# to hide it from the JIT...
need_wrapper = (macro is not None or save_err != RFFI_ERR_NONE)
- # XXX ...and unless we're on Windows, because the calling convention
- # is unknown so far and thus the JIT can't assume it knows it...
- if sys.platform == 'win32':
+ # ...and unless we're on Windows and the calling convention is
+ # 'win' or 'unknown'
+ if calling_conv != 'c':
need_wrapper = True
#
if not need_wrapper:
@@ -1290,23 +1293,15 @@
# You would have to have a *huge* amount of data for this to block long enough
# to be worth it to release the GIL.
-_c_memcpy = llexternal("memcpy",
+c_memcpy = llexternal("memcpy",
[VOIDP, VOIDP, SIZE_T],
lltype.Void,
releasegil=False,
- _nowrapper=True
+ calling_conv='c',
)
-_c_memset = llexternal("memset",
+c_memset = llexternal("memset",
[VOIDP, lltype.Signed, SIZE_T],
lltype.Void,
releasegil=False,
- _nowrapper=True
+ calling_conv='c',
)
-
[email protected]()
-def c_memcpy(dst, src, size):
- _c_memcpy(cast(VOIDP, dst), cast(VOIDP, src), cast(SIZE_T, size))
-
[email protected]()
-def c_memset(s, c, n):
- _c_memset(cast(VOIDP, s), cast(lltype.Signed, c), cast(SIZE_T, n))
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